A device for testing the fatigue resistance of asphalt mixtures

Abstract

The utility model relates to test device technical field discloses an asphalt mixture anti -fatigue performance testing arrangement, including mainframe, the top fixed connection of mainframe has loading mechanism, the inside rotation of loading mechanism is connected with dismantling mechanism, the top fixed connection of mainframe has sensor group, the right side fixed connection of mainframe has control mechanism, the top left side fixed connection of mainframe has data processing module, the rear side fixed connection of control mechanism has heat dissipation mechanism, the loading mechanism includes support frame, the bottom fixed connection of support frame is in the top of mainframe, the outside fixed connection of multiple support frame has fixed plate. In the utility model, realized the installation and dismounting to pressure head, and then greatly shortened the test interval time, improved the overall test efficiency, made in unit time can complete more test, accelerated the research progress.

Description

Technical Field

[0001] This utility model relates to the field of testing device technology, and in particular to a testing device for the fatigue resistance of asphalt mixtures. Background Technology

[0002] Testing equipment refers to the collective term for equipment, instruments, and related systems used to measure, detect, and test the performance, characteristics, and state of specific objects. When developing new asphalt or modifying existing asphalt, researchers need to use this equipment to test the fatigue resistance of asphalt mixtures made from new materials in order to evaluate whether they meet the requirements for road use, such as testing the fatigue resistance of rubber-modified asphalt, SBS-modified asphalt, and other mixtures to determine the modification effect.

[0003] A search revealed Chinese patent publication number CN205879708U, which discloses a device for testing the fatigue performance of asphalt mixtures. The device includes a housing, a vertical pressure device, a displacement sensor, a first sliding block, a second sliding block, and an external computer. The first and second sliding blocks are laid parallel to each other on the housing and can slide freely on it. The displacement sensor is positioned between the first and second sliding blocks. The upper surface of the first sliding block, the sensing head of the displacement sensor, and the upper surface of the second sliding block are on the same horizontal plane. The vertical pressure device is positioned directly above the asphalt mixture to be tested and applies vertical pressure to it. The vertical pressure device and the displacement sensor are connected to the external computer. This invention provides a device for testing the fatigue performance of asphalt mixtures, which can more realistically simulate the complex stress state experienced by asphalt mixtures in pavement structures.

[0004] The aforementioned patent mentions that "this utility model simultaneously considers the influence of compressive stress, tensile stress, and interlayer shear force on the performance of asphalt mixtures, and more realistically simulates the working state of asphalt mixtures in actual road surfaces." Although the aforementioned patent can more realistically simulate the working state of asphalt mixtures in actual road surfaces, some fatigue performance testing devices in the prior art are difficult to disassemble the pressure head. For example, when conducting a series of fatigue performance tests on asphalt mixtures under different conditions, if it is difficult to disassemble the pressure head after each test, it will lead to a significant extension of the time for replacing specimens or conducting the next set of tests, delaying the entire test plan and affecting the research progress and the timeliness of data acquisition. Therefore, an asphalt mixture fatigue performance testing device is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a fatigue performance testing device for asphalt mixtures, which aims to improve the problem that some fatigue performance testing devices in the prior art are difficult to disassemble the pressure head, which leads to a significant increase in the time required to replace the specimen or conduct the next set of tests.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A fatigue performance testing device for asphalt mixture includes a main frame, a loading mechanism fixedly connected to the top of the main frame, a disassembly mechanism rotatably connected inside the loading mechanism, a sensor group fixedly connected to the top of the main frame, a control mechanism fixedly connected to the right side of the main frame, a data processing module fixedly connected to the top left side of the main frame, and a heat dissipation mechanism fixedly connected to the rear side of the control mechanism.

[0008] The loading mechanism includes a support frame, the bottom of which is fixedly connected to the top of the main frame. A fixing plate is fixedly connected to the outside of multiple support frames. An electric cylinder is fixedly connected to the bottom of the fixing plate. A pressure head is fixedly connected to the drive end of the electric cylinder. Sliding rods are fixedly connected to the top left and right sides of the pressure head. A connecting plate is fixedly connected to the bottom of the two sliding rods. A pressure head is detachably connected to the bottom of the connecting plate.

[0009] Furthermore, in this asphalt mixture fatigue performance testing device, the main frame supports all components, and the loading mechanism, through the coordinated work of the support frame, fixing plate, electric cylinder, pressure head, sliding rod, and connecting plate, applies pressure to the specimen. The disassembly mechanism allows for convenient installation and removal of the pressure head. The sensor group monitors pressure, displacement, and temperature data in real time. The control mechanism precisely controls the testing process based on the data, the data processing module processes and analyzes the data, and the heat dissipation mechanism ensures the normal operation of key components in the control mechanism, collectively achieving accurate testing of the fatigue performance of asphalt mixtures.

[0010] As a further description of the above technical solution:

[0011] The disassembly mechanism includes a rotating column, a circular plate fixedly connected to the bottom of the rotating column, an arc-shaped opening on both the front and rear sides of the circular plate, a positioning column rotatably connected inside the arc-shaped opening, a sliding block fixedly connected to the bottom of the positioning column, a telescopic spring fixedly connected to the adjacent side of the two sliding blocks, an elongated opening on both the left and right sides of the inside of the connecting plate, and a square block fixedly connected to the top left and right sides of the pressure head, with a square opening inside the square block.

[0012] Furthermore, in the disassembly mechanism, the rotating column drives the circular plate to rotate, causing the positioning column to move along the arc-shaped opening, which in turn drives the sliding block to slide, compressing or releasing the telescopic spring. The sliding block engages or disengages from the square opening inside the square block on the pressure head. At the same time, the elongated opening guides the sliding block, achieving a stable lock on the pressure head on the connecting plate and convenient disassembly.

[0013] As a further description of the above technical solution:

[0014] The sensor group includes a load sensor, the bottom of which is fixedly connected to the rear top of the main frame, a displacement sensor is fixedly connected to the front top of the main frame, and a temperature sensor is fixedly connected to the left top of the main frame.

[0015] Furthermore, in the sensor group, the load sensor monitors the pressure applied to the specimen in real time during loading, the displacement sensor measures the displacement change of the specimen during loading, and the temperature sensor monitors the temperature change of the test environment or the specimen itself. The three work together to provide key data support such as pressure, displacement, and temperature for accurately evaluating the fatigue resistance of asphalt mixtures.

[0016] As a further description of the above technical solution:

[0017] The control mechanism includes a PLC controller, the left side of which is fixedly connected to the right side of the main frame, and a touch screen is fixedly connected to the front side of the PLC controller.

[0018] Furthermore, in the control mechanism, the PLC controller receives data from the sensor group, processes and analyzes it according to the preset program algorithm, and then controls the loading mechanism to operate, thereby achieving precise control of the testing process; the touch screen provides operators with a human-machine interface, making it convenient to set test parameters, view test data and results in real time, and thus monitor and adjust the testing process.

[0019] As a further description of the above technical solution:

[0020] The heat dissipation mechanism includes a fixed box, the front side of which is fixedly connected to the rear side of the PLC controller, a heat absorption plate is fixedly connected to the front side of the interior of the fixed box, a heat dissipation plate is fixedly connected to the rear side of the interior of the fixed box, fans are fixedly connected to the top and bottom sides of the fixed box, and multiple air outlets are opened on the left and right sides of the fixed box.

[0021] Furthermore, in the heat dissipation mechanism, the fixed box provides installation and protection space for each component, the heat absorption plate is in close contact with the PLC controller to absorb heat and transfer it to the heat sink, the fans on the upper and lower sides accelerate airflow through forced convection to quickly remove the heat from the heat sink, and the air outlets on the left and right sides promptly exhaust hot air, together to reduce the temperature of the PLC controller and ensure its normal and stable operation.

[0022] As a further description of the above technical solution:

[0023] The two sliding rods are externally slidably connected to the left and right sides inside the fixed plate, and the rotating column is externally fixedly connected to a handle;

[0024] Furthermore, the sliding rod slides within the fixed plate to ensure the vertical movement accuracy of the pressure head, enabling accurate loading of the specimen; the handle outside the rotating column allows the operator to rotate the rotating column, thereby driving the circular plate and other components to move, enabling convenient installation and removal of the pressure head, improving operational convenience and testing efficiency.

[0025] As a further description of the above technical solution:

[0026] The outer part of the circular plate is rotatably connected to the inner part of the connecting plate, the outer part of the sliding block engages with the inner wall of the square opening, and the outer part of the square opening engages with the inner wall of the elongated opening.

[0027] Furthermore, the circular plate rotates within the connecting plate, causing the positioning column and sliding block to move. When the sliding block engages with the inner wall of the square opening, it locks the pressure head, ensuring its stability and preventing loosening during loading. When the sliding block disengages from the square opening, the pressure head can be disassembled. The square opening, in conjunction with the elongated opening, guides and restricts the movement of the sliding block, ensuring the reliability and convenience of pressure head installation and disassembly.

[0028] As a further description of the above technical solution:

[0029] The rear side of the heat absorption plate is fixedly connected to the front side of the heat dissipation plate, and the front side of the heat absorption plate is fixedly connected to the rear side of the PLC controller.

[0030] Furthermore, the front side of the heat absorption plate is attached to the PLC controller to quickly absorb the heat generated during its operation, while the rear side is connected to the heat sink to conduct the heat to the heat sink. The heat sink expands the heat dissipation area and efficiently dissipates the heat, thereby effectively reducing the temperature of the PLC controller and ensuring its stable operation.

[0031] This utility model has the following beneficial effects:

[0032] 1. In this utility model, by rotating the handle, the handle drives the rotating column to rotate, the rotating column drives the circular plate to rotate, and the circular plate drives the positioning column to move along the inner wall of the arc-shaped opening. After the positioning column drives the sliding block to slide, the sliding block compresses the telescopic spring, realizing the installation and removal of the pressure head, thereby greatly shortening the test interval time, improving the overall test efficiency, enabling more tests to be completed in a unit of time, and accelerating the research progress.

[0033] 2. In this utility model, heat absorption is achieved through a heat absorption plate, and under the action of a heat dissipation plate, the heat dissipation plate dissipates heat from the heat absorption plate. After the fan is started, the heat dissipation of the heat absorption plate is accelerated by the fan, thereby cooling down the control mechanism. This reduces the thermal noise of electronic components, reduces signal interference, and makes the signal transmission and processing of the control system more stable, thus ensuring the measurement accuracy and control precision of the testing device. Attached Figure Description

[0034] Figure 1 This is a three-dimensional schematic diagram of an asphalt mixture fatigue resistance testing device proposed in this utility model;

[0035] Figure 2 This is a schematic diagram of the support frame structure of the asphalt mixture fatigue resistance testing device proposed in this utility model;

[0036] Figure 3 This is a schematic diagram of the connecting plate structure of the asphalt mixture fatigue resistance testing device proposed in this utility model;

[0037] Figure 4 for Figure 3 Enlarged view of point A in the image;

[0038] Figure 5 This is a schematic diagram of the fixing plate structure of the fatigue resistance testing device for asphalt mixture proposed in this utility model;

[0039] Figure 6 This is a schematic diagram of the fixed box structure of an asphalt mixture fatigue resistance testing device proposed in this utility model.

[0040] Legend:

[0041] 1. Main frame; 2. Loading mechanism; 201. Support frame; 202. Fixing plate; 203. Electric cylinder; 204. Sliding rod; 205. Connecting plate; 206. Pressure head; 3. Disassembly mechanism; 301. Rotating column; 302. Circular plate; 303. Arc-shaped opening; 304. Positioning column; 305. Sliding block; 306. Telescopic spring; 307. Long slot; 308. Square block; 309. Square opening; 310. Handle; 4. Sensor group; 401. Load sensor; 402. Displacement sensor; 403. Temperature sensor; 5. Control mechanism; 501. PLC controller; 502. Touch screen; 6. Data processing module; 7. Heat dissipation mechanism; 701. Fixing box; 702. Heat absorption plate; 703. Heat dissipation plate; 704. Fan; 705. Air outlet. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0043] Reference Figure 1 , Figure 4 , Figure 5 An embodiment of this utility model is provided: an asphalt mixture fatigue performance testing device, including a main frame 1, a loading mechanism 2 fixedly connected to the top of the main frame 1, a disassembly mechanism 3 rotatably connected inside the loading mechanism 2, a sensor group 4 fixedly connected to the top of the main frame 1, a control mechanism 5 fixedly connected to the right side of the main frame 1, a data processing module 6 fixedly connected to the top left side of the main frame 1, and a heat dissipation mechanism 7 fixedly connected to the rear side of the control mechanism 5.

[0044] The loading mechanism 2 includes a support frame 201, the bottom of which is fixedly connected to the top of the main frame 1. Its function is to support the fixing plate 202 and related components, ensuring that components such as the electric cylinder 203 are at a suitable height and position. This guarantees that the loading mechanism 2 can accurately apply pressure to the asphalt mixture specimen and withstand the reaction force generated during loading, maintaining the stability of the loading mechanism. Multiple support frames 201 are externally fixedly connected to the fixing plate 202, and the bottom of the fixing plate 202 is fixedly connected to the electric cylinder 203. The multiple support frames 201 fix important components such as the electric cylinder 203, ensuring the electric cylinder 203 remains stable during operation, and also serve as a sliding rod 204. A sliding track is provided to ensure the vertical movement accuracy of the pressure head 206, thereby achieving accurate loading of the specimen. The driving end of the electric cylinder 203 is fixedly connected to the pressure head 206. Sliding rods 204 are fixedly connected to the top left and right sides of the pressure head 206. The bottom of the two sliding rods 204 is fixedly connected to the connecting plate 205. The bottom of the connecting plate 205 is detachably connected to the pressure head 206. The pressure head 206 is a component that directly contacts the asphalt mixture specimen and applies pressure. Its shape and size are designed according to the test requirements. It can evenly transmit the force of the electric cylinder 203 to the specimen, so that the specimen generates corresponding stress and strain to test its fatigue resistance.

[0045] Specifically, through the coordinated work of the components in the loading mechanism 2, the support frame 201 supports the fixing plate 202 and related components, so that the electric cylinder 203 is in a suitable position and bears the reaction force, maintaining the stability of the loading mechanism 2. The fixing plate 202 fixes the electric cylinder 203 and provides a track for the sliding rod 204. The electric cylinder 203 drives the pressure head 206. The sliding rod 204 cooperates with the connecting plate 205 to realize the precise movement of the pressure head 206 in the vertical direction. The pressure head 206 can evenly transmit the force of the electric cylinder 203 to the asphalt mixture specimen, so that the specimen generates corresponding stress and strain, thereby enabling accurate fatigue performance testing of the specimen.

[0046] Reference Figures 2 to 4The disassembly mechanism 3 includes a rotating column 301, with a circular plate 302 fixedly connected to its bottom. Its main function is to rotate the circular plate 302 when the handle 310 is turned, thereby controlling the sliding block 305. It is a key component providing power transmission for the disassembly and installation of the pressure head 206 and is the core rotating component of the disassembly mechanism. The circular plate 302 is fixedly connected to the bottom of the rotating column 301. Arc-shaped openings 303 are provided on both the front and rear sides of the circular plate 302. These arc-shaped openings 303 provide a movement track for the positioning column 304, allowing it to move through its specific... The arc-shaped design allows the positioning post 304 to accurately drive the sliding block 305 to slide during rotation, thereby locking and unlocking the pressure head 206. This ensures the stability of the pressure head 206 during installation and the ease of disassembly. The positioning post 304 is rotatably connected inside the arc-shaped opening 303. The bottom of the positioning post 304 is fixedly connected to the sliding block 305. A telescopic spring 306 is fixedly connected to the adjacent side of the two sliding blocks 305. The telescopic spring 306 connects the two sliding blocks 305 and plays a role in buffering and resetting when the sliding blocks 305 slide. When the circular plate 302 is rotated to make the sliding block 305 slide outward, the telescopic spring 306 is compressed; when the handle 310 is released, the telescopic spring 306 returns to its original state, so that the sliding block 305 can automatically reset and maintain the locked state of the pressure head 206. The connecting plate 205 has long slots 307 on both the left and right sides inside. The square blocks 308 fixedly connected to the top left and right sides of the pressure head 206 have square openings 309 inside, which are used to engage with the sliding block 305 to fix the pressure head 206. The square block 308 increases the connection strength and stability between the pressure head 206 and the connecting plate 205, ensuring that the pressure head 206 will not loosen during loading. The square block 308 has a square opening 309 inside. The two sliding rods 204 are slidably connected to the left and right sides inside the fixed plate 202. The rotating column 301 is fixedly connected to the handle 310. The circular plate 302 is rotatably connected to the inside of the connecting plate 205. The outside of the sliding block 305 is engaged with the inner wall of the square opening 309. The outside of the square opening 309 is engaged with the inner wall of the elongated opening 307.

[0047] Specifically, through the cooperation of components such as the rotating column 301, circular plate 302, arc-shaped opening 303, positioning column 304, sliding block 305, telescopic spring 306, elongated opening 307, square block 308, square opening 309, and handle 310 in the disassembly mechanism 3, rotating the handle 310 drives the rotating column 301 and circular plate 302 to rotate, causing the positioning column 304 to move along the arc-shaped opening 303, which in turn drives the sliding block 305 to slide, compressing or releasing the telescopic spring 306. The sliding block 305 engages or disengages from the square opening 309. At the same time, combined with the guidance of the elongated opening 307 on the sliding block 305, the pressure head 206 is securely locked on the connecting plate 205 and easily disassembled. This ensures the stability of the pressure head 206 during loading and facilitates its installation and replacement.

[0048] Reference Figure 2 Sensor group 4 includes a load sensor 401, whose main function is to monitor the pressure applied to the asphalt mixture specimen by the loading mechanism 2 in real time. By accurately measuring the load, it provides accurate loading force data for the testing device, enabling researchers to understand the fatigue resistance performance of the specimen under different pressures. This is an important data source for evaluating specimen performance. The bottom of the load sensor 401 is fixedly connected to the top rear side of the main frame 1. A displacement sensor 402 is fixedly connected to the top front side of the main frame 1. The displacement sensor 402 is used to measure the displacement change of the specimen during loading. By monitoring the displacement, the deformation of the specimen can be reflected. Combined with the data from the load sensor 401, the stress-strain relationship of the specimen can be analyzed to further evaluate the fatigue resistance and deformation characteristics of the asphalt mixture. A temperature sensor 403 is fixedly connected to the top left side of the main frame 1, mainly used to monitor the temperature change of the testing environment or the specimen itself. Temperature has a significant impact on the performance of asphalt mixtures. By measuring the temperature in real time, researchers can consider the influence of temperature factors when analyzing test results, ensuring the accuracy and reliability of the test results and providing more valuable parameters for practical engineering applications.

[0049] Specifically, through the coordinated operation of the load sensor 401, displacement sensor 402, and temperature sensor 403 in sensor group 4, the load sensor 401 monitors the pressure applied to the asphalt mixture specimen by the loading mechanism 2 in real time, providing accurate loading force data for the test; the displacement sensor 402 measures the displacement change of the specimen during the loading process, and the stress-strain relationship can be analyzed by combining the pressure data; the temperature sensor 403 monitors the temperature change of the test environment or the specimen, enabling researchers to consider the temperature factor when analyzing the results. Together, the three sensors achieve comprehensive monitoring of key parameters such as pressure, displacement, and temperature during the loading process of the asphalt mixture specimen, providing reliable data support for accurately evaluating the fatigue resistance and deformation characteristics of asphalt mixtures, ensuring that the test results are accurate, reliable, and have practical engineering application value.

[0050] Reference Figure 2 The control mechanism 5 includes a PLC controller 501, which is fixedly connected to the right side of the main frame 1 on the left side. The PLC controller receives data from the sensor group 4, processes and analyzes the data according to preset programs and algorithms, and controls the operation of components such as the electric cylinder 203 of the loading mechanism 2 to achieve precise control of the testing process and ensure that the test is carried out according to the predetermined requirements. A touch screen 502 is fixedly connected to the front of the PLC controller 501, providing the operator with an intuitive and convenient human-machine interface. The operator can set test parameters, such as the loading force, loading frequency, and test time, through the touch screen 502, and can also view test data and test results in real time, facilitating monitoring and adjustment of the test process.

[0051] Specifically, through the cooperation of the PLC controller 501 and the touch screen 502 in the control mechanism 5, the PLC controller 501, fixed on the right side of the main frame 1, receives data from the sensor group 4, processes and analyzes the data according to preset programs and algorithms, and controls the operation of components such as the electric cylinder 203 of the loading mechanism 2, thereby achieving precise control over the testing process. The touch screen 502, fixed on the front side of the PLC controller 501, provides operators with an intuitive and convenient human-machine interface. It allows setting test parameters such as loading force, loading frequency, and test time, and also enables real-time viewing of test data and results. This achieves comprehensive operation of the testing process, from parameter setting to real-time monitoring and adjustment, ensuring that the test is carried out accurately according to predetermined requirements.

[0052] Reference Figure 2 and Figure 6 The heat dissipation mechanism 7 includes a fixed box 701. The front side of the fixed box 701 is fixedly connected to the rear side of the PLC controller 501. A heat absorption plate 702 is fixedly connected to the front side of the interior of the fixed box 701, and a heat dissipation plate 703 is fixedly connected to the rear side of the interior of the fixed box 701. Fans 704 are fixedly connected to both the upper and lower sides of the fixed box 701. The fans 704 accelerate the airflow through forced convection, quickly remove the heat dissipated by the heat dissipation plate 703, and improve the heat dissipation efficiency. The operation of fan 704 can reduce the temperature of PLC controller 501 to a suitable range in a shorter time, ensuring the normal operation of the control mechanism. Multiple air outlets 705 are provided on both the left and right sides of the fixed box 701. The rear side of heat absorption plate 702 is fixedly connected to the front side of heat dissipation plate 703, and the front side of heat absorption plate 702 is fixedly connected to the rear side of PLC controller 501. Its function is to provide space for the installation and protection of other components of the heat dissipation mechanism. The heat absorption plate 702, heat dissipation plate 703 and fan 704 are integrated together to form an effective heat dissipation system, ensuring the heat dissipation effect of PLC controller 501.

[0053] Specifically, through the coordinated operation of the fixed box 701, heat absorption plate 702, heat dissipation plate 703, fan 704, and air outlet 705 in the heat dissipation mechanism 7, the fixed box 701 is fixed to the rear of the PLC controller 501, providing installation and protection space for each component and integrating to form an effective heat dissipation system. The heat absorption plate 702 is connected to the rear of the PLC controller 501 to absorb heat and then transfer it to the heat dissipation plate 703 on the rear. The fans 704 on the upper and lower sides accelerate airflow through forced convection, quickly removing the heat emitted by the heat dissipation plate 703. The air outlets 705 on the left and right sides promptly exhaust hot air, together achieving the rapid reduction of the temperature of the PLC controller 501 to a suitable range, ensuring the normal and stable operation of the PLC controller 501 in the control mechanism 5, and thus ensuring the normal functioning of the control function of the entire testing device.

[0054] Working principle: When the pressure head 206 needs to be disassembled, the handle 310 is rotated first, which drives the rotating column 301 to rotate. The rotating column 301 drives the circular plate 302 to rotate, which in turn drives the positioning column 304 to move along the inner wall of the arc-shaped opening 303. After the positioning column 304 drives the sliding block 305 to slide, the sliding block 305 compresses the telescopic spring 306. At this time, the sliding block 305 disengages from the inner wall of the square opening 309, realizing the installation and disassembly of the pressure head. This greatly shortens the test interval time, improves the overall test efficiency, and enables more tests to be completed per unit time, thus accelerating the research progress.

[0055] When the PLC controller 501 is running, the heat emitted by the PLC controller 501 is absorbed by the heat absorption plate 702. Under the action of the heat dissipation plate 703, the heat dissipation plate 703 dissipates heat from the heat absorption plate 702. After the fan 704 is started, the heat dissipation of the heat absorption plate 702 is accelerated by the fan 704. The hot air blown out is dispersed through the air outlet 705, which cools down the control mechanism. This reduces the thermal noise of electronic components, reduces signal interference, and makes the signal transmission and processing of the control system more stable, thereby ensuring the measurement accuracy and control accuracy of the testing device.

[0056] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fatigue performance testing device for asphalt mixtures, comprising a main frame (1), characterized in that: The top of the main frame (1) is fixedly connected to a loading mechanism (2), and the inside of the loading mechanism (2) is rotatably connected to a disassembly mechanism (3). The top of the main frame (1) is fixedly connected to a sensor group (4). The right side of the main frame (1) is fixedly connected to a control mechanism (5). The top left side of the main frame (1) is fixedly connected to a data processing module (6). The rear side of the control mechanism (5) is fixedly connected to a heat dissipation mechanism (7). The loading mechanism (2) includes a support frame (201), the bottom of which is fixedly connected to the top of the main frame (1). A fixing plate (202) is fixedly connected to the outside of multiple support frames (201). An electric cylinder (203) is fixedly connected to the bottom of the fixing plate (202). A pressure head (206) is fixedly connected to the drive end of the electric cylinder (203). Sliding rods (204) are fixedly connected to the top left and right sides of the pressure head (206). A connecting plate (205) is fixedly connected to the bottom of the two sliding rods (204). The pressure head (206) is detachably connected to the bottom of the connecting plate (205).

2. The fatigue resistance testing device for asphalt mixtures according to claim 1, characterized in that: The disassembly mechanism (3) includes a rotating column (301), a circular plate (302) is fixedly connected to the bottom of the rotating column (301), and arc-shaped openings (303) are provided on both the front and rear sides of the interior of the circular plate (302). A positioning column (304) is rotatably connected inside the arc-shaped opening (303). A sliding block (305) is fixedly connected to the bottom of the positioning column (304). A telescopic spring (306) is fixedly connected to the adjacent side of the two sliding blocks (305). A long slot (307) is provided on both the left and right sides of the interior of the connecting plate (205). A square block (308) is fixedly connected to the top left and right sides of the pressure head (206). A square opening (309) is provided inside the square block (308).

3. The fatigue resistance testing device for asphalt mixtures according to claim 1, characterized in that: The sensor group (4) includes a load sensor (401), the bottom of which is fixedly connected to the rear top of the main frame (1), a displacement sensor (402) is fixedly connected to the front top of the main frame (1), and a temperature sensor (403) is fixedly connected to the left top of the main frame (1).

4. The fatigue resistance testing device for asphalt mixtures according to claim 1, characterized in that: The control mechanism (5) includes a PLC controller (501), the left side of which is fixedly connected to the right side of the main frame (1), and a touch screen (502) is fixedly connected to the front side of the PLC controller (501).

5. The fatigue resistance testing device for asphalt mixtures according to claim 4, characterized in that: The heat dissipation mechanism (7) includes a fixed box (701), the front side of which is fixedly connected to the rear side of the PLC controller (501), a heat absorption plate (702) is fixedly connected to the front side inside the fixed box (701), a heat dissipation plate (703) is fixedly connected to the rear side inside the fixed box (701), a fan (704) is fixedly connected to both the upper and lower sides of the fixed box (701), and multiple air outlets (705) are opened on both the left and right sides of the fixed box (701).

6. The fatigue resistance testing device for asphalt mixtures according to claim 2, characterized in that: The two sliding rods (204) are externally slidably connected to the left and right sides inside the fixed plate (202), and the rotating column (301) is externally fixedly connected to a handle (310).

7. The fatigue resistance testing device for asphalt mixtures according to claim 2, characterized in that: The outer side of the circular plate (302) is rotatably connected to the inside of the connecting plate (205), the outer side of the sliding block (305) engages with the inner wall of the square opening (309), and the outer side of the square opening (309) engages with the inner wall of the elongated opening (307).

8. The fatigue resistance testing device for asphalt mixtures according to claim 5, characterized in that: The rear side of the heat absorption plate (702) is fixedly connected to the front side of the heat dissipation plate (703), and the front side of the heat absorption plate (702) is fixedly connected to the rear side of the PLC controller (501).

Images